JPH08117898A - Automatic tube expander - Google Patents

Abstract

PURPOSE: To precisely and effectively execute working in the vertical direction against the longitudinal direction of a cylindrical body as for an automatic tube expander applied to the tube expanding working inside drum of the product of cylindrical body which is a long size like a boiler drum, etc., and whose inlet diameter is smaller than the internal diameter part. CONSTITUTION: A rail 4 is laid inside a cylindrical body 1, a carriage 2 to move on the rail, a rotary tool 3 to be attached on the carriage, and a propping jig 6 are carried inside the cylinder like body in a state of being detached, then these are assembled inside the cylinder like body 1. With a lifting means, the rotary tool 3 and the propping jig 6 are ascended, approached to the position of a penetrating hole 1b (hole to be worked), the rotary tool 3 is fit in a water tube 1' fit in the hole 1b while rotating and a requiring tube expanding working is executed. In this time, the rotary tool 3 is fixed firmly and the sure working of tube expanding is backed up by fitting the propping jig 6 in the water tube 1' to be attached to an other penetrating hole adjoined to this hole to be worked.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic pipe expanding apparatus which is applied to a pipe expanding operation in a drum for a long tubular product having an inlet diameter smaller than an internal diameter such as a boiler cylinder.

[0002]

2. Description of the Related Art Conventionally, in a long tubular body such as a boiler drum, in the work of expanding a large number of water pipes to be mounted on the outer peripheral surface thereof, a rotary working tool in which a worker arranges a large number of rotary rollers in a spiral shape at the tip thereof. The operator has held the drive unit, etc., attached by hand to expand the water pipe in the tubular body.

[0003]

However, the following problems have been encountered in the conventional pipe mounting and expanding work of the water pipe in the tubular body as described above.

(1) It is extremely inefficient because the worker is moving and working inside the cylindrical body in a poor working environment while holding the weight of the rotary processing tool and its drive portion.

(2) When the operator expands the water pipe to be attached to the outer peripheral surface of the cylindrical body by using the rotary processing tool, the operator himself supports the bending moment generated in the rotary processing tool, which is very heavy work. It was

The present invention solves these problems and provides a new automatic tube expanding device which can perform the tube expanding operation in the direction perpendicular or substantially perpendicular to the lengthwise direction of the tubular body extremely efficiently and economically. The purpose is to do.

[0007]

As an arrangement for achieving the above object, an automatic pipe expanding apparatus of the present invention is provided in a tubular body such as a relatively long boiler cylinder having an inlet portion smaller than the internal space width. On a trolley that travels on a laid rail and is contractible in the width direction, a rotary processing tool that is rotatable about an axis that is perpendicular or substantially perpendicular to the length direction of the tubular body is mounted, and the rotation is performed. It is characterized in that a tensioning jig is installed in parallel at a position appropriately separated from the processing tool, and further, an elevating means and an up-down adjusting means for vertically moving the rotating processing tool and the tensioning jig are provided on the carriage. ..

[0008]

In use, the automatic pipe expanding apparatus of the present invention constructed as described above firstly lays a rail inside a tubular body such as a boiler drum, and installs a dolly movable along the rail. With the rotary processing tool and the tensioning jig to be mounted on the upper part removed, that is, in a state in which it contracts within a width smaller than the width of the inlet part, is passed through the inlet part and carried into the tubular body,
Then, a rotary processing tool, a rotary motor for driving the rotary processing tool, and a tensioning jig that opposes a bending moment acting on the cart are mounted on the carriage, and an elevating means and a vertical adjusting means for moving them up and down are mounted. .

Then, after driving the elevating means, the rotary processing tool is rotated in the axial direction perpendicular or substantially perpendicular to the length direction of the tubular body, and the pipe ends of a large number of water pipes attached to the outer peripheral surface of the tubular body. Pipe expansion work.

During pipe expansion work by the rotary processing tool, in order to effectively counter the processing reaction force applied to the processing tool, the carriage, the rail, etc., the tip of a tension jig juxtaposed with the rotary processing tool at an appropriate interval. By abutting against the inner surfaces of the water pipes mounted on the outer peripheral surface of the tubular body, the rotary processing tool is firmly fixed to perform reliable and accurate pipe expanding work.

Further, when the inner diameter of the tubular body changes, the vertical body adjusting means performs centering of the tubular body, the rotary processing tool, the tension jig and the like.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. 1 is a partially cutaway perspective view of an automatic tube expanding device according to an embodiment of the present invention, FIG. 2 is a plan view of the same, FIG. 3 is a side view thereof, and FIG. 4 is a sectional view taken along line AA of FIG. FIG. 5 is BB of FIG.
FIG. 6 is a cross-sectional view and FIG. 6 is a perspective view of the rotary processing tool and the water pipe.

In these figures, reference numeral 1 denotes a cylindrical tube having a diameter l of the coaxial core inlet portions 1a, 1a located at both ends thereof smaller than the internal space diameter L and having a relatively long length. A boiler cylinder which is an example of a cylindrical body, and a diametrical through hole 1 for mounting a number of water pipes 1 ′ on its outer peripheral surface.
b are provided at appropriate intervals in the axial direction and the circumferential direction, respectively.

The truck 2 is provided with the inlet portions 1a, 1 of the boiler body 1.
It is a trolley that is large enough to pass through a and is movable along a rail 4 laid in the lengthwise direction inside the boiler barrel.

Reference numeral 3 is a rotary processing tool mounted on the carriage 2.
As shown in FIGS. 1 and 6, the rotary working tool 3 includes a through hole 1b pierced in a diametrical direction on the outer peripheral surface of the boiler body 1 and an end of a water pipe 1'inserted into each of the through holes 1b. Inside the part, it is possible to sequentially insert and move while rotating,
A large number of rotating rollers 3a are arranged in a spiral shape on the head along the peripheral surface of the cone.

Reference numeral 5 is a drive motor for rotating the rotary working tool 3, 6 is a tensioning jig which is juxtaposed at a proper distance from the rotary machining tool 3, and the tensioning jig 6 is the water pipe 1 '. When the rotary processing tool 3 expands the pipe by ascending by the force of the cylinder 7 into the inside of the
Bending moment and reaction force acting on the carriage 2 and the like are transmitted to the tubular body 1.

Numeral 7 is used for inserting the processing tool 3 and the tension jig 6 arranged in parallel with the processing tool 3 into the water tube 1'and the water pipe in the vicinity thereof when expanding the water tube 1'using the rotary processing tool 3. The upper and lower cylinders are installed on the carriage 2 and have a function of simultaneously moving up and down the drive motor 5 of the rotary processing tool 3.

Reference numeral 8 denotes the rotary processing tool 3 and drive motor 5
It is an up-down adjustment bolt (manual) for aligning the rotation center axis of the rotation motor 9 for rotating the inside of the tubular body 1 in the circumferential direction with the center of the tubular body 1.

Reference numeral 9 is a rotary motor for rotating the rotary processing tool 3, the drive motor 5, the tension jig 6, and the upper and lower cylinders 7 in the circumferential direction inside the tubular body.

Next, as shown in FIGS. 2 to 5, bolts 19 to which the sprocket 11 is fixed are rotatably attached to the bogie 2 at four positions. The attachment position of the sprocket 11 to the bolt 19 is as follows. Between the dolly 2 and the vertical moving base 2A (the sprocket 11 is not shown in FIG. 3)
It has become. The bolt 19 and the vertical moving table 2A are screwed together.

An endless chain 12 is suspended on the four sprockets 11, and a handle 10 provided on the carriage 2 is provided.
By turning (manual), the up-and-down moving table 2A moves up and down.

The tension jig 6 is configured to slide along the frame 13 in the front-rear direction of the carriage 2.

The drive motor 5 and the frame 13 are connected to each other by the connecting member 1.
6, slide part 14, upper and lower cylinder 7, slide part 1
It is cantilevered to the up-and-down moving table 2A via the 5, the slide portion 22, and the rotary motor 9. These parts are designed to be inserted into the space 2A 'of the vertical moving table, so that the entire apparatus is made more compact.

Reference numeral 21 is a positioning sensor for setting the present apparatus, 22 is a portion which slides up and down by turning the bolt 8, 15 is a portion which slides up and down by the cylinder 7, and 14 is a portion when the apparatus is in operation. This is a part that slides when the rotary processing tool 3 is getting into the water pipe 1 '.

Reference numeral 17 is a cylinder for moving the frame 13 up and down to the position 13A, and 18 is a wheel. Reference numeral 20 denotes a stopper that holds the rail 4 and stabilizes the device when the device is operated.

Next, the operation of this apparatus will be described. After laying the rail 4 inside the boiler cylinder 1, the frame 17 is lowered to the position of the frame 13 by the cylinder 17 with the rotary processing tool 3 and the tension jig 6 removed, and the handle 10 (manual) is turned. The trolley 2 is inserted into the boiler barrel 1 in a state where the vertical moving table 2A is lowered, and the processing device portion is lowered again by the vertical adjustment bolt 8 and the cylinder 7, and the rotary processing tool 3 and the bracing jig 6 are attached. It is attached to the frame 13 via the drive motor 15 attached to the trolley 2 in 1.

Then, the handle 10 is turned to bring the processing device portion close to the central portion of the boiler cylinder 1, and then the signal of the sensor 21 is sent so that the central position of the boiler cylinder 1 and the rotational center position of the rotary motor 9 coincide with each other. Adjust the vertical adjustment bolt 8 while looking.

At a predetermined position, that is, the rotary processing tool 3
And the supporting jig 6 at a position corresponding to the processed hole (through hole) 1b of the rotary processing tool 3 and the supporting jig 6 at the position corresponding to the adjacent holes 1'and 1'in the vicinity of the processed hole. It is stopped and the stopper 20 is fixed to the rail 4, and the water pipe 1'fitted in the through hole 1b is attached to the frame 1 by the cylinder 17.
3 is lifted and the rotary working tool 3 is rotated while being pressure-fitted. At this time, the bracing jig 6 is also put into the water pipe 1 '.

After the work in the hole to be processed (through hole) 1b is completed, the cylinder 7 and the cylinder 17 are lowered to pull out the rotary processing tool 3 and the tension jig 6 from the water pipe 1'and move the carriage 2. Alternatively, by rotating the rotary motor 9, the position of the rotary processing tool 3 is moved to the next hole 1b to be processed.

After finishing such processing for each hole 1b, the vertical adjusting bolt 8 is lowered, the rotary processing tool 3 and the tension jig 6 are removed from the drive motor 5 on the carriage 2, and the vertical moving table 2A and processing are performed again. The device part is lowered and pulled out from the boiler barrel 1.

Although one embodiment of the present invention has been briefly described above, the present invention is not limited to the above embodiment, and various design changes can be made within the scope of the technical idea of the present invention. It belongs to the technical scope of the present invention.

[0032]

The automatic tube expanding device of the present invention has the following effects. (1) At the time of desired rotary machining, not only the rotary machining tool 3 but also the bogie 2 and the rail 4 that controls the movement of the bogie 2 have a large bending moment about the vertical axis and the horizontal horizontal axis as a processing reaction force. However, in the present invention, in order to counteract such a bending moment, the rotary processing tool 3 is firmly provided by providing the tensioning jig 6 that comes into contact with the inner surface of the water pipe 1'which is mounted on the outer peripheral surface of the cylindrical body. Fixed,
Sure and accurate processing work can be performed.

(2) The rotation processing tool 3 is provided through the inner surface of the water pipe 1'having a large number of the tension jigs 6 attached to the outer peripheral surface of the cylindrical body.
The large bending moment generated around the axis of the vertical axis and around the axis of the horizontal axis caused by the rotation processing by
Since the large bending moment force acts on the trolley 2 and the rail 4 which is the movement path of the trolley 2 because it is absorbed by, the force of the trolley 2 and the rail 4 is not deformed or broken. Therefore, the movement of the carriage 2 can always be maintained in a smooth state, and the desired processing can be reliably performed even after long-term use, and the processing efficiency can be remarkably improved by performing the processing smoothly and accurately.

Therefore, according to the above (1) and (2), the present invention is extremely efficient and economical in processing the inside of the cylindrical body 1 in a direction perpendicular or substantially perpendicular to the length direction of this cylindrical body. It is possible to provide a high-performance processing apparatus for the inside of a tubular body that can be performed.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view of an automatic tube expanding device according to an embodiment of the present invention.

FIG. 2 is a plan view of the device.

FIG. 3 is a side view of the same device.

FIG. 4 is a sectional view taken along line AA of FIG. 3;

FIG. 5 is a sectional view taken along line BB of FIG. 1;

FIG. 6 is a perspective view of a rotary processing tool and a water pipe.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cylindrical body 1'Water pipe 1a Cylindrical body inlet part 1b Through hole 2 Car 2A Vertical moving table 3 Rotating tool 3a Rotating roller 4 Rail 5 Drive motor 6 Stretching jig 7 Vertical cylinder 8 Vertical adjustment bolt 9 Rotating motor 10 Handle 11 Sprocket 12 Endless chain 13, 13A Frame 14, 15, 22 Slide part 16 Connecting member 17 Cylinder 18 Wheel 19 Bolt 20 Stopper 21 Positioning sensor

Claims (1)

[Claims] 1. A tubular body, which is contractible in a width direction and travels on a rail laid inside a tubular body such as a relatively long boiler cylinder having an inlet portion smaller than the internal space width. A rotary processing tool that is rotatable about an axis that is vertical or substantially vertical to the length direction of the is installed, and a tensioning jig is provided in parallel at a position that is appropriately separated from the rotary processing tool.
An automatic tube expanding device comprising an elevating means and an up-down adjusting means for moving up and down the rotary processing tool and the tension jig on the carriage.